How much? and which is more? — the words for quantity and comparison where small mistakes creep in.
Countable nouns have plurals and take „a/an”; uncountable ones (water, advice, information) don't — use „some”, „much”.
„Some” in positives and offers, „any” in questions and negatives.
„Many / a few” with countable nouns, „much / a little” with uncountable. „A lot of” fits both.
Short adjectives: -er + than; longer ones: more + than. Irregular: good→better, bad→worse.
She is more tall than me.She is taller than me.
Short adjectives compare with -er, not „more”: „taller”, not „more tall”. „More” is for longer ones (more interesting).
Superlatives always take „the”: the -est or the most. Irregular: the best, the worst.
Comparison of equals: „as … as”. Negative: „not as … as”.